Adhesives compatible with corrosion sensitive layers

Abstract

An article comprising an adhesive having an acid number of less than about 5 is provided. The adhesive is selected from the group consisting of polyurea, polyamide, polyurethane, polyester, addition cure silicone and combinations thereof. The adhesive is in contact with a corrosion sensitive layer selected from the group of metal and metal alloys. When the article is conditioned for about 21 days at about 60° C and 90% relative humidity, the corrosion sensitive layer exhibits a change from its initial electrical resistance value of 20% or less.

1 . An article comprising an adhesive having an acid number of less than about 5 and selected from the group consisting of polyurea, polyamide, polyurethane, polyester, addition cure silicone and combinations thereof in contact with a corrosion sensitive layer selected from the group of metal and metal alloys, wherein when the article is conditioned for about 21 days at about 60° C. and 90% relative humidity, the corrosion sensitive layer exhibits a change from its initial electrical resistance value of 20% or less. 
   
   
       2 . The article of  claim 1 , wherein the corrosion sensitive layer is disposed on a first major surface of a substrate. 
   
   
       3 . The article of  claim 2 , wherein at least one of the adhesive and substrate is optically clear. 
   
   
       4 . The article of  claim 2 , wherein the substrate is selected from the group consisting of glass and polymeric film. 
   
   
       5 . The article of  claim 2  wherein the corrosion sensitive layer covers substantially all or covers a portion of the first major surface of the substrate. 
   
   
       6 . The article of  claim 5 , wherein when the corrosion sensitive layer covers a portion of the first major surface of the substrate, the layer is in a regular pattern. 
   
   
       7 . The article of  claim 1 , wherein the corrosion sensitive layer is selected from the group consisting of copper, copper alloy, silver, silver alloy, indium-tin-oxide, nickel, aluminum, and antimony tin oxide. 
   
   
       8 . The article of  claim 1  wherein the corrosion sensitive layer is substantially flat. 
   
   
       9 . The article of  claim 2  comprising a plurality of alternating layers of adhesive and substrate having a corrosion sensitive layer disposed on the substrate. 
   
   
       10 . The article of  claim 2  further comprising a connector pad disposed adjacent to an edge of the substrate and connected to the corrosion sensitive layer. 
   
   
       11 . The article of  claim 2 , wherein the substrate has a second major surface opposite of the first major surface, each surface having the corrosion sensitive layer disposed on at least a portion thereof and the adhesive disposed on the corrosion sensitive layer. 
   
   
       12 . The article of  claim 1 , wherein the adhesive is a pressure sensitive adhesive, a heat activated adhesive, or a cure in place adhesive. 
   
   
       13 . The article of  claim 1 , wherein the adhesive is a film having opposing first and second major surfaces and the corrosion sensitive layer is disposed on each of the first and second surfaces of the adhesive film. 
   
   
       14 . A method of making an article comprising the steps of:
 providing a substrate having a corrosion sensitive layer disposed on at least a portion thereof;   providing a tape comprising (i) a backing having opposing first and second major surfaces, (ii) an adhesive having an acid number of less than about 5 and selected from the group consisting of polyurea, polyamide, polyurethane, polyester, addition cure silicone and combinations thereof; and   laminating the tape to the substrate such that the adhesive contacts the corrosion sensitive layer.   
   
   
       15  The method of  claim 14 , wherein at least one of the adhesive and substrate is optically clear. 
   
   
       16 . The method of  claim 14 , wherein the substrate is selected from the group consisting of glass and polymeric film. 
   
   
       17 . The method of  claim 14 , wherein when the corrosion sensitive layer covers is in a regular pattern. 
   
   
       18 . The method of  claim 14 , wherein the corrosion sensitive layer is selected from the group consisting of copper, cooper alloy, silver, silver alloy, indium-tin-oxide, nickel, aluminum, and antimony tin oxide. 
   
   
       19 . The method of  claim 14  wherein the corrosion sensitive layer is substantially flat. 
   
   
       20 . The method of  claim 14  further comprising a connector pad disposed adjacent to an edge of the substrate and in contact with the corrosion sensitive layer.